Across years
Input: 2000-01-01 to 2026-06-07
Output: 26y 5m 6d
9,654 total days between the two dates.
Date difference calculator
Find the exact gap between two dates in years, months, and days, plus the total number of days.
Difference:
Enter both dates.
Formula and algorithm
- The difference is computed in UTC to avoid time-zone and daylight-saving errors.
- Years, months, and days are counted calendar-style; the total days is the raw day count.
- Order does not matter — the earlier date is always treated as the start.
Worked examples
One week
Input: 2026-06-01 to 2026-06-08
Output: 0y 0m 7d
7 total days.
Reversed input
Input: 2026-06-07 to 2000-01-01
Output: 26y 5m 6d
Order is ignored; same result as the forward direction.
FAQ
Does it include both end dates?
The total days is the count between the dates; it does not add an extra day for the end date.
Are leap years handled?
Yes. February 29 and leap years are counted correctly using a UTC calendar.
Why UTC?
Using UTC avoids off-by-one errors that local time zones and daylight saving can introduce.
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Updated: June 7, 2026